Practice Makes Permanent.
If the tongue consistently rests in a forward position keeping the mouth open, there can be excessive saliva causing drooling.
Mouth breathing tends to bring the head forward in front of their shoulders and back to maintain an open airway. It may be termed the long face syndrome.
Another less than desirable trait is an open lip rest position. It maybe with or without mouth-breathing.
An inappropriate tongue position can have an adverse affect on teeth position and cause teeth to be out of alignment. It can manifest as an open or cross bite leaving a less desirable smile.
When a person swallows incorrectly, they will often purse and tighten the muscles of the cheeks, chin and lips. A symptom known as a facial grimace. Over time this can give the chin a knobby appearance because these muscles are being overused.
The most obvious symptom of incorrect oral patterns involve the muscles of the face. A dull, sluggish appearance and full, weak lips can develop when the orofacial muscles are functioning inappropriately.
Mouth breathing can make chewing and swallowing more difficult and one can find themselves embarrassed eating in public. It is difficult to chew with the lips closed and food may fall from the mouth.